157434381 has 16 divisors (see below), whose sum is σ = 251177920. Its totient is φ = 96882480.

The previous prime is 157434377. The next prime is 157434391. The reversal of 157434381 is 183434751.

It is a happy number.

157434381 is a `hidden beast` number, since 1 + 574 + 3 + 4 + 3 + 81 = 666.

It is not a de Polignac number, because 157434381 - 2² = 157434377 is a prime.

It is a super-2 number, since 2×157434381² = 49571168641706322, 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 (157434311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223915 + ... + 224616.

It is an arithmetic number, because the mean of its divisors is an integer number (15698620).

Almost surely, 2^157434381 is an apocalyptic number.

It is an amenable number.

157434381 is a deficient number, since it is larger than the sum of its proper divisors (93743539).

157434381 is a wasteful number, since it uses less digits than its factorization.

157434381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448553 (or 448547 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 157434381 is about 12547.2858021167. The cubic root of 157434381 is about 539.9661398522.

The spelling of 157434381 in words is "one hundred fifty-seven million, four hundred thirty-four thousand, three hundred eighty-one".