61531486 has 16 divisors (see below), whose sum is σ = 97054848. Its totient is φ = 29200600.

The previous prime is 61531471. The next prime is 61531499. The reversal of 61531486 is 68413516.

It is a happy number.

It is a super-2 number, since 2×61531486² = 7572247538736392, which contains 22 as substring.

It is a congruent number.

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, 921 + ... + 11131.

It is an arithmetic number, because the mean of its divisors is an integer number (6065928).

Almost surely, 2^61531486 is an apocalyptic number.

61531486 is a deficient number, since it is larger than the sum of its proper divisors (35523362).

61531486 is a wasteful number, since it uses less digits than its factorization.

61531486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10367.

The product of its digits is 17280, while the sum is 34.

The square root of 61531486 is about 7844.2007878432. The cubic root of 61531486 is about 394.7896888230.

The spelling of 61531486 in words is "sixty-one million, five hundred thirty-one thousand, four hundred eighty-six".