151631 has 2 divisors, whose sum is σ = 151632. Its totient is φ = 151630.

The previous prime is 151609. The next prime is 151637. The reversal of 151631 is 136151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 151631 - 2¹⁰ = 150607 is a prime.

It is a super-2 number, since 2×151631² = 45983920322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75815 + 75816.

It is an arithmetic number, because the mean of its divisors is an integer number (75816).

2¹⁵¹⁶³¹ is an apocalyptic number.

151631 is a deficient number, since it is larger than the sum of its proper divisors (1).

151631 is an equidigital number, since it uses as much as digits as its factorization.

151631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90, while the sum is 17.

The square root of 151631 is about 389.3982537198. The cubic root of 151631 is about 53.3248120066.

Adding to 151631 its reverse (136151), we get a palindrome (287782).

The spelling of 151631 in words is "one hundred fifty-one thousand, six hundred thirty-one".