1081457631 has 12 divisors (see below), whose sum is σ = 1630023408. Its totient is φ = 689625024.

The previous prime is 1081457627. The next prime is 1081457651. The reversal of 1081457631 is 1367541801.

1081457631 is a `hidden beast` number, since 1 + 0 + 8 + 14 + 5 + 7 + 631 = 666.

It is not a de Polignac number, because 1081457631 - 2² = 1081457627 is a prime.

It is a super-2 number, since 2×1081457631² = 2339101215296264322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081457651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2612010 + ... + 2612423.

It is an arithmetic number, because the mean of its divisors is an integer number (135835284).

Almost surely, 2^1081457631 is an apocalyptic number.

1081457631 is a deficient number, since it is larger than the sum of its proper divisors (548565777).

1081457631 is a wasteful number, since it uses less digits than its factorization.

1081457631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5224462 (or 5224459 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1081457631 is about 32885.5231218845. The cubic root of 1081457631 is about 1026.4469371619.

The spelling of 1081457631 in words is "one billion, eighty-one million, four hundred fifty-seven thousand, six hundred thirty-one".