131213001 has 32 divisors (see below), whose sum is σ = 184187520. Its totient is φ = 83026944.

The previous prime is 131212951. The next prime is 131213009. The reversal of 131213001 is 100312131.

It is not a de Polignac number, because 131213001 - 2⁶ = 131212937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131213009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1161121 + ... + 1161233.

It is an arithmetic number, because the mean of its divisors is an integer number (5755860).

Almost surely, 2^131213001 is an apocalyptic number.

It is an amenable number.

131213001 is a deficient number, since it is larger than the sum of its proper divisors (52974519).

131213001 is a wasteful number, since it uses less digits than its factorization.

131213001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 131213001 is about 11454.8243548297. The cubic root of 131213001 is about 508.1504207147.

Adding to 131213001 its reverse (100312131), we get a palindrome (231525132).

The spelling of 131213001 in words is "one hundred thirty-one million, two hundred thirteen thousand, one".