131213651 has 4 divisors (see below), whose sum is σ = 131315352. Its totient is φ = 131111952.

The previous prime is 131213647. The next prime is 131213659. The reversal of 131213651 is 156312131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131213651 - 2² = 131213647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131213659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48890 + ... + 51503.

It is an arithmetic number, because the mean of its divisors is an integer number (32828838).

Almost surely, 2^131213651 is an apocalyptic number.

131213651 is a deficient number, since it is larger than the sum of its proper divisors (101701).

131213651 is a wasteful number, since it uses less digits than its factorization.

131213651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101700.

The product of its digits is 540, while the sum is 23.

The square root of 131213651 is about 11454.8527271196. The cubic root of 131213651 is about 508.1512598014.

Adding to 131213651 its reverse (156312131), we get a palindrome (287525782).

The spelling of 131213651 in words is "one hundred thirty-one million, two hundred thirteen thousand, six hundred fifty-one".