157272731 has 16 divisors (see below), whose sum is σ = 196777728. Its totient is φ = 122114400.

The previous prime is 157272667. The next prime is 157272737. The reversal of 157272731 is 137272751.

It is a cyclic number.

It is not a de Polignac number, because 157272731 - 2⁶ = 157272667 is a prime.

It is a super-2 number, since 2×157272731² = 49469423832396722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 157272691 and 157272700.

It is not an unprimeable number, because it can be changed into a prime (157272737) 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 15 ways as a sum of consecutive naturals, for example, 19076 + ... + 26046.

It is an arithmetic number, because the mean of its divisors is an integer number (12298608).

Almost surely, 2^157272731 is an apocalyptic number.

157272731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157272731 is a deficient number, since it is larger than the sum of its proper divisors (39504997).

157272731 is a wasteful number, since it uses less digits than its factorization.

157272731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7282.

The product of its digits is 20580, while the sum is 35.

The square root of 157272731 is about 12540.8425155569. The cubic root of 157272731 is about 539.7812682944.

The spelling of 157272731 in words is "one hundred fifty-seven million, two hundred seventy-two thousand, seven hundred thirty-one".