157515641 has 4 divisors (see below), whose sum is σ = 157540992. Its totient is φ = 157490292.

The previous prime is 157515637. The next prime is 157515647. The reversal of 157515641 is 146515751.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 146515751 = 101 ⋅1450651.

It is a cyclic number.

It is not a de Polignac number, because 157515641 - 2² = 157515637 is a prime.

It is a super-2 number, since 2×157515641² = 49622354319281762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157515647) 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, 3680 + ... + 18126.

It is an arithmetic number, because the mean of its divisors is an integer number (39385248).

Almost surely, 2^157515641 is an apocalyptic number.

It is an amenable number.

157515641 is a deficient number, since it is larger than the sum of its proper divisors (25351).

157515641 is a wasteful number, since it uses less digits than its factorization.

157515641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25350.

The product of its digits is 21000, while the sum is 35.

The square root of 157515641 is about 12550.5235348969. The cubic root of 157515641 is about 540.0590253266.

The spelling of 157515641 in words is "one hundred fifty-seven million, five hundred fifteen thousand, six hundred forty-one".