2155532450 has 12 divisors (see below), whose sum is σ = 4009290450. Its totient is φ = 862212960.

The previous prime is 2155532447. The next prime is 2155532461. The reversal of 2155532450 is 542355512.

It can be written as a sum of positive squares in 3 ways, for example, as 1411279489 + 744252961 = 37567^2 + 27281^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21555275 + ... + 21555374.

Almost surely, 2^2155532450 is an apocalyptic number.

2155532450 is a deficient number, since it is larger than the sum of its proper divisors (1853758000).

2155532450 is a wasteful number, since it uses less digits than its factorization.

2155532450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43110661 (or 43110656 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 2155532450 is about 46427.7120909484. The cubic root of 2155532450 is about 1291.7689910382.

Adding to 2155532450 its reverse (542355512), we get a palindrome (2697887962).

The spelling of 2155532450 in words is "two billion, one hundred fifty-five million, five hundred thirty-two thousand, four hundred fifty".