61931502 has 48 divisors (see below), whose sum is σ = 140849280. Its totient is φ = 19629456.

The previous prime is 61931491. The next prime is 61931537. The reversal of 61931502 is 20513916.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93649 + ... + 94307.

It is an arithmetic number, because the mean of its divisors is an integer number (2934360).

Almost surely, 2^61931502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61931502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70424640).

61931502 is an abundant number, since it is smaller than the sum of its proper divisors (78917778).

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

61931502 is a wasteful number, since it uses less digits than its factorization.

61931502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917 (or 914 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 61931502 is about 7869.6570446240. The cubic root of 61931502 is about 395.6433504512.

The spelling of 61931502 in words is "sixty-one million, nine hundred thirty-one thousand, five hundred two".