276401631 has 12 divisors (see below), whose sum is σ = 405085016. Its totient is φ = 167515920.

The previous prime is 276401627. The next prime is 276401641. The reversal of 276401631 is 136104672.

It is not a de Polignac number, because 276401631 - 2² = 276401627 is a prime.

It is a super-2 number, since 2×276401631² = 152795723238920322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276401621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 380356 + ... + 381081.

Almost surely, 2^276401631 is an apocalyptic number.

276401631 is a deficient number, since it is larger than the sum of its proper divisors (128683385).

276401631 is a wasteful number, since it uses less digits than its factorization.

276401631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761462 (or 761451 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 276401631 is about 16625.3310042236. The cubic root of 276401631 is about 651.3986694479.

The spelling of 276401631 in words is "two hundred seventy-six million, four hundred one thousand, six hundred thirty-one".