31520225001 has 32 divisors (see below), whose sum is σ = 44299035648. Its totient is φ = 19914310080.

The previous prime is 31520224997. The next prime is 31520225029. The reversal of 31520225001 is 10052202513.

It is not a de Polignac number, because 31520225001 - 2² = 31520224997 is a prime.

It is a super-2 number, since 2×31520225001² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31520225201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 630030 + ... + 678216.

It is an arithmetic number, because the mean of its divisors is an integer number (1384344864).

Almost surely, 2^31520225001 is an apocalyptic number.

It is an amenable number.

31520225001 is a deficient number, since it is larger than the sum of its proper divisors (12778810647).

31520225001 is a wasteful number, since it uses less digits than its factorization.

31520225001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48381.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 31520225001 its reverse (10052202513), we get a palindrome (41572427514).

The spelling of 31520225001 in words is "thirty-one billion, five hundred twenty million, two hundred twenty-five thousand, one".