157621238 has 16 divisors (see below), whose sum is σ = 238314960. Its totient is φ = 78185856.

The previous prime is 157621237. The next prime is 157621253. The reversal of 157621238 is 832126751.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 157621198 and 157621207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157621237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190181 + ... + 191007.

It is an arithmetic number, because the mean of its divisors is an integer number (14894685).

Almost surely, 2^157621238 is an apocalyptic number.

157621238 is a deficient number, since it is larger than the sum of its proper divisors (80693722).

157621238 is a wasteful number, since it uses less digits than its factorization.

157621238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471.

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

The square root of 157621238 is about 12554.7297063696. The cubic root of 157621238 is about 540.1796818605.

Adding to 157621238 its reverse (832126751), we get a palindrome (989747989).

The spelling of 157621238 in words is "one hundred fifty-seven million, six hundred twenty-one thousand, two hundred thirty-eight".