61525031 has 4 divisors (see below), whose sum is σ = 61801152. Its totient is φ = 61248912.

The previous prime is 61525001. The next prime is 61525033. The reversal of 61525031 is 13052516.

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-61525031 is a prime.

It is a super-3 number, since 3×61525031³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61524988 and 61525006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61525033) 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, 137726 + ... + 138171.

It is an arithmetic number, because the mean of its divisors is an integer number (15450288).

Almost surely, 2^61525031 is an apocalyptic number.

61525031 is a deficient number, since it is larger than the sum of its proper divisors (276121).

61525031 is a wasteful number, since it uses less digits than its factorization.

61525031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276120.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 61525031 is about 7843.7893265946. The cubic root of 61525031 is about 394.7758831184.

Adding to 61525031 its reverse (13052516), we get a palindrome (74577547).

The spelling of 61525031 in words is "sixty-one million, five hundred twenty-five thousand, thirty-one".