157820151 has 4 divisors (see below), whose sum is σ = 210426872. Its totient is φ = 105213432.

The previous prime is 157820147. The next prime is 157820203. The reversal of 157820151 is 151028751.

157820151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 157820151 - 2² = 157820147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157820851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26303356 + ... + 26303361.

It is an arithmetic number, because the mean of its divisors is an integer number (52606718).

Almost surely, 2^157820151 is an apocalyptic number.

157820151 is a deficient number, since it is larger than the sum of its proper divisors (52606721).

157820151 is an equidigital number, since it uses as much as digits as its factorization.

157820151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52606720.

The product of its (nonzero) digits is 2800, while the sum is 30.

The square root of 157820151 is about 12562.6490438920. The cubic root of 157820151 is about 540.4068162135.

The spelling of 157820151 in words is "one hundred fifty-seven million, eight hundred twenty thousand, one hundred fifty-one".