31225002990 has 32 divisors (see below), whose sum is σ = 78884219520. Its totient is φ = 7888421664.

The previous prime is 31225002983. The next prime is 31225002997. The reversal of 31225002990 is 9920052213.

It is an interprime number because it is at equal distance from previous prime (31225002983) and next prime (31225002997).

It is a super-3 number, since 3×31225002990³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31225002997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27389784 + ... + 27390923.

It is an arithmetic number, because the mean of its divisors is an integer number (2465131860).

Almost surely, 2^31225002990 is an apocalyptic number.

31225002990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31225002990 is an abundant number, since it is smaller than the sum of its proper divisors (47659216530).

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

31225002990 is a wasteful number, since it uses less digits than its factorization.

31225002990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54780736.

The product of its (nonzero) digits is 9720, while the sum is 33.

The spelling of 31225002990 in words is "thirty-one billion, two hundred twenty-five million, two thousand, nine hundred ninety".