157320149 has 4 divisors (see below), whose sum is σ = 179794464. Its totient is φ = 134845836.

The previous prime is 157320143. The next prime is 157320169. The reversal of 157320149 is 941023751.

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: 941023751 = 5171 ⋅181981.

It is a cyclic number.

It is not a de Polignac number, because 157320149 - 2¹⁶ = 157254613 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 (157320143) 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, 11237147 + ... + 11237160.

It is an arithmetic number, because the mean of its divisors is an integer number (44948616).

Almost surely, 2^157320149 is an apocalyptic number.

It is an amenable number.

157320149 is a deficient number, since it is larger than the sum of its proper divisors (22474315).

157320149 is an equidigital number, since it uses as much as digits as its factorization.

157320149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22474314.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 157320149 is about 12542.7329159159. The cubic root of 157320149 is about 539.8355111715.

The spelling of 157320149 in words is "one hundred fifty-seven million, three hundred twenty thousand, one hundred forty-nine".