253571540 has 12 divisors (see below), whose sum is σ = 532500276. Its totient is φ = 101428608.

The previous prime is 253571531. The next prime is 253571603. The reversal of 253571540 is 45175352.

It can be written as a sum of positive squares in 2 ways, for example, as 27730756 + 225840784 = 5266^2 + 15028^2 .

It is a junction number, because it is equal to n+sod(n) for n = 253571497 and 253571506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6339269 + ... + 6339308.

It is an arithmetic number, because the mean of its divisors is an integer number (44375023).

Almost surely, 2^253571540 is an apocalyptic number.

253571540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253571540 is an abundant number, since it is smaller than the sum of its proper divisors (278928736).

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

253571540 is a wasteful number, since it uses less digits than its factorization.

253571540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12678586 (or 12678584 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 253571540 is about 15923.9297913549. The cubic root of 253571540 is about 632.9462571681.

The spelling of 253571540 in words is "two hundred fifty-three million, five hundred seventy-one thousand, five hundred forty".