157382621 has 4 divisors (see below), whose sum is σ = 171690144. Its totient is φ = 143075100.

The previous prime is 157382581. The next prime is 157382627. The reversal of 157382621 is 126283751.

It is a happy number.

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: 126283751 = 11 ⋅11480341.

It is a cyclic number.

It is not a de Polignac number, because 157382621 - 2⁶ = 157382557 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 (157382627) 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 3 ways as a sum of consecutive naturals, for example, 7153745 + ... + 7153766.

It is an arithmetic number, because the mean of its divisors is an integer number (42922536).

Almost surely, 2^157382621 is an apocalyptic number.

157382621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

157382621 is a deficient number, since it is larger than the sum of its proper divisors (14307523).

157382621 is a wasteful number, since it uses less digits than its factorization.

157382621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14307522.

The product of its digits is 20160, while the sum is 35.

The square root of 157382621 is about 12545.2230350839. The cubic root of 157382621 is about 539.9069581354.

The spelling of 157382621 in words is "one hundred fifty-seven million, three hundred eighty-two thousand, six hundred twenty-one".