1351553540 has 24 divisors (see below), whose sum is σ = 2839800600. Its totient is φ = 540328448.

The previous prime is 1351553527. The next prime is 1351553551. The reversal of 1351553540 is 453551531.

It can be written as a sum of positive squares in 4 ways, for example, as 68194564 + 1283358976 = 8258^2 + 35824^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1351553497 and 1351553506.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21644 + ... + 56316.

It is an arithmetic number, because the mean of its divisors is an integer number (118325025).

Almost surely, 2^1351553540 is an apocalyptic number.

1351553540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1351553540 is an abundant number, since it is smaller than the sum of its proper divisors (1488247060).

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

1351553540 is a wasteful number, since it uses less digits than its factorization.

1351553540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36631 (or 36629 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 32.

The square root of 1351553540 is about 36763.4810647740. The cubic root of 1351553540 is about 1105.6332345032.

The spelling of 1351553540 in words is "one billion, three hundred fifty-one million, five hundred fifty-three thousand, five hundred forty".