31315030950 has 96 divisors (see below), whose sum is σ = 88824743424. Its totient is φ = 7152157440.

The previous prime is 31315030949. The next prime is 31315030951. The reversal of 31315030950 is 5903051313.

It is an interprime number because it is at equal distance from previous prime (31315030949) and next prime (31315030951).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31315030951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1424442 + ... + 1446258.

It is an arithmetic number, because the mean of its divisors is an integer number (925257744).

Almost surely, 2^31315030950 is an apocalyptic number.

31315030950 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31315030950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44412371712).

31315030950 is an abundant number, since it is smaller than the sum of its proper divisors (57509712474).

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

31315030950 is a wasteful number, since it uses less digits than its factorization.

31315030950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23206 (or 23201 counting only the distinct ones).

The product of its (nonzero) digits is 6075, while the sum is 30.

The spelling of 31315030950 in words is "thirty-one billion, three hundred fifteen million, thirty thousand, nine hundred fifty".