157244521 has 8 divisors (see below), whose sum is σ = 179936640. Its totient is φ = 134609568.

The previous prime is 157244497. The next prime is 157244539. The reversal of 157244521 is 125442751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157244521 - 2¹¹ = 157242473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157244621) 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, 8221 + ... + 19546.

It is an arithmetic number, because the mean of its divisors is an integer number (22492080).

Almost surely, 2^157244521 is an apocalyptic number.

It is an amenable number.

157244521 is a deficient number, since it is larger than the sum of its proper divisors (22692119).

157244521 is an equidigital number, since it uses as much as digits as its factorization.

157244521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28583.

The product of its digits is 11200, while the sum is 31.

The square root of 157244521 is about 12539.7177400450. The cubic root of 157244521 is about 539.7489928537.

The spelling of 157244521 in words is "one hundred fifty-seven million, two hundred forty-four thousand, five hundred twenty-one".