1055215400 has 24 divisors (see below), whose sum is σ = 2453376270. Its totient is φ = 422086080.

The previous prime is 1055215391. The next prime is 1055215409. The reversal of 1055215400 is 45125501.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1055215391) and next prime (1055215409).

It can be written as a sum of positive squares in 3 ways, for example, as 806900836 + 248314564 = 28406^2 + 15758^2 .

It is a super-2 number, since 2×1055215400² = 2226959080794320000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1055215409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2637839 + ... + 2638238.

Almost surely, 2^1055215400 is an apocalyptic number.

1055215400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1055215400 is an abundant number, since it is smaller than the sum of its proper divisors (1398160870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1055215400 is a wasteful number, since it uses less digits than its factorization.

1055215400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276093 (or 5276084 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 1055215400 is about 32484.0791773447. The cubic root of 1055215400 is about 1018.0764079476.

It can be divided in two parts, 10552 and 15400, that added together give a palindrome (25952).

The spelling of 1055215400 in words is "one billion, fifty-five million, two hundred fifteen thousand, four hundred".