61531925 has 96 divisors (see below), whose sum is σ = 104493312. Its totient is φ = 34836480.

The previous prime is 61531913. The next prime is 61531933. The reversal of 61531925 is 52913516.

It is not a de Polignac number, because 61531925 - 2⁴ = 61531909 is a prime.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 61531891 and 61531900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1430954 + ... + 1430996.

It is an arithmetic number, because the mean of its divisors is an integer number (1088472).

Almost surely, 2^61531925 is an apocalyptic number.

61531925 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61531925 is a deficient number, since it is larger than the sum of its proper divisors (42961387).

61531925 is a wasteful number, since it uses less digits than its factorization.

61531925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 122 counting only the distinct ones).

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

The square root of 61531925 is about 7844.2287702489. The cubic root of 61531925 is about 394.7906277041.

The spelling of 61531925 in words is "sixty-one million, five hundred thirty-one thousand, nine hundred twenty-five".