61495531 has 4 divisors (see below), whose sum is σ = 62995464. Its totient is φ = 59995600.

The previous prime is 61495519. The next prime is 61495543. The reversal of 61495531 is 13559416.

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

It is an interprime number because it is at equal distance from previous prime (61495519) and next prime (61495543).

It is a cyclic number.

It is not a de Polignac number, because 61495531 - 2⁹ = 61495019 is a prime.

It is a super-2 number, since 2×61495531² = 7563400665943922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61495331) 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, 749905 + ... + 749986.

It is an arithmetic number, because the mean of its divisors is an integer number (15748866).

Almost surely, 2^61495531 is an apocalyptic number.

61495531 is a deficient number, since it is larger than the sum of its proper divisors (1499933).

61495531 is a wasteful number, since it uses less digits than its factorization.

61495531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1499932.

The product of its digits is 16200, while the sum is 34.

The square root of 61495531 is about 7841.9086324695. The cubic root of 61495531 is about 394.7127773646.

It can be divided in two parts, 61495 and 531, that added together give a palindrome (62026).

The spelling of 61495531 in words is "sixty-one million, four hundred ninety-five thousand, five hundred thirty-one".