157134981 has 4 divisors (see below), whose sum is σ = 209513312. Its totient is φ = 104756652.

The previous prime is 157134973. The next prime is 157135031. The reversal of 157134981 is 189431751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 189431751 = 3 ⋅63143917.

It is not a de Polignac number, because 157134981 - 2³ = 157134973 is a prime.

It is a super-2 number, since 2×157134981² = 49382804507740722, 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 (157134911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26189161 + ... + 26189166.

It is an arithmetic number, because the mean of its divisors is an integer number (52378328).

Almost surely, 2^157134981 is an apocalyptic number.

It is an amenable number.

157134981 is a deficient number, since it is larger than the sum of its proper divisors (52378331).

157134981 is an equidigital number, since it uses as much as digits as its factorization.

157134981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52378330.

The product of its digits is 30240, while the sum is 39.

The square root of 157134981 is about 12535.3492572006. The cubic root of 157134981 is about 539.6236300563.

The spelling of 157134981 in words is "one hundred fifty-seven million, one hundred thirty-four thousand, nine hundred eighty-one".