61319031 has 8 divisors (see below), whose sum is σ = 81897600. Its totient is φ = 40809912.

The previous prime is 61318997. The next prime is 61319053. The reversal of 61319031 is 13091316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61319031 - 2⁶ = 61318967 is a prime.

It is a super-2 number, since 2×61319031² = 7520047125557922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61318992 and 61319010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61319431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15265 + ... + 18858.

It is an arithmetic number, because the mean of its divisors is an integer number (10237200).

Almost surely, 2^61319031 is an apocalyptic number.

61319031 is a deficient number, since it is larger than the sum of its proper divisors (20578569).

61319031 is a wasteful number, since it uses less digits than its factorization.

61319031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34725.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 61319031 is about 7830.6469081424. The cubic root of 61319031 is about 394.3347902089.

The spelling of 61319031 in words is "sixty-one million, three hundred nineteen thousand, thirty-one".