61259531 has 4 divisors (see below), whose sum is σ = 62915232. Its totient is φ = 59603832.

The previous prime is 61259509. The next prime is 61259537. The reversal of 61259531 is 13595216.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61259531 is a prime.

It is a super-2 number, since 2×61259531² = 7505460276679922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61259537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827795 + ... + 827868.

It is an arithmetic number, because the mean of its divisors is an integer number (15728808).

Almost surely, 2^61259531 is an apocalyptic number.

61259531 is a deficient number, since it is larger than the sum of its proper divisors (1655701).

61259531 is a wasteful number, since it uses less digits than its factorization.

61259531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655700.

The product of its digits is 8100, while the sum is 32.

The square root of 61259531 is about 7826.8468108172. The cubic root of 61259531 is about 394.2072033206.

The spelling of 61259531 in words is "sixty-one million, two hundred fifty-nine thousand, five hundred thirty-one".