61103538 has 16 divisors (see below), whose sum is σ = 135785760. Its totient is φ = 20367828.

The previous prime is 61103513. The next prime is 61103587. The reversal of 61103538 is 83530116.

It is a super-2 number, since 2×61103538² = 7467284712234888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 565720 + ... + 565827.

It is an arithmetic number, because the mean of its divisors is an integer number (8486610).

Almost surely, 2^61103538 is an apocalyptic number.

61103538 is an abundant number, since it is smaller than the sum of its proper divisors (74682222).

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

61103538 is a wasteful number, since it uses less digits than its factorization.

61103538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131558 (or 1131552 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 61103538 is about 7816.8752068841. The cubic root of 61103538 is about 393.8723121151.

The spelling of 61103538 in words is "sixty-one million, one hundred three thousand, five hundred thirty-eight".