157155407 has 4 divisors (see below), whose sum is σ = 157275696. Its totient is φ = 157035120.

The previous prime is 157155359. The next prime is 157155413. The reversal of 157155407 is 704551751.

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

It is a cyclic number.

It is not a de Polignac number, because 157155407 - 2¹⁰ = 157154383 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 (157155907) 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, 58163 + ... + 60804.

It is an arithmetic number, because the mean of its divisors is an integer number (39318924).

Almost surely, 2^157155407 is an apocalyptic number.

157155407 is a deficient number, since it is larger than the sum of its proper divisors (120289).

157155407 is a wasteful number, since it uses less digits than its factorization.

157155407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120288.

The product of its (nonzero) digits is 24500, while the sum is 35.

The square root of 157155407 is about 12536.1639667005. The cubic root of 157155407 is about 539.6470109624.

The spelling of 157155407 in words is "one hundred fifty-seven million, one hundred fifty-five thousand, four hundred seven".