1531454157 has 24 divisors (see below), whose sum is σ = 2332062720. Its totient is φ = 967004640.

The previous prime is 1531454147. The next prime is 1531454189. The reversal of 1531454157 is 7514541351.

1531454157 is a `hidden beast` number, since 1 + 53 + 1 + 454 + 157 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1531454157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531454117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45282 + ... + 71507.

It is an arithmetic number, because the mean of its divisors is an integer number (97169280).

Almost surely, 2^1531454157 is an apocalyptic number.

It is an amenable number.

1531454157 is a deficient number, since it is larger than the sum of its proper divisors (800608563).

1531454157 is a wasteful number, since it uses less digits than its factorization.

1531454157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116873 (or 116870 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 1531454157 is about 39133.7981417598. The cubic root of 1531454157 is about 1152.6602953827.

The spelling of 1531454157 in words is "one billion, five hundred thirty-one million, four hundred fifty-four thousand, one hundred fifty-seven".