631380151 has 4 divisors (see below), whose sum is σ = 638474400. Its totient is φ = 624285904.

The previous prime is 631380097. The next prime is 631380161. The reversal of 631380151 is 151083136.

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 631380151 - 2⁷ = 631380023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631380161) 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, 3546991 + ... + 3547168.

It is an arithmetic number, because the mean of its divisors is an integer number (159618600).

Almost surely, 2^631380151 is an apocalyptic number.

631380151 is a deficient number, since it is larger than the sum of its proper divisors (7094249).

631380151 is an equidigital number, since it uses as much as digits as its factorization.

631380151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7094248.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 631380151 is about 25127.2790210162. The cubic root of 631380151 is about 857.8874373953.

The spelling of 631380151 in words is "six hundred thirty-one million, three hundred eighty thousand, one hundred fifty-one".