157821052 has 6 divisors (see below), whose sum is σ = 276186848. Its totient is φ = 78910524.

The previous prime is 157821043. The next prime is 157821077. The reversal of 157821052 is 250128751.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19727628 + ... + 19727635.

Almost surely, 2^157821052 is an apocalyptic number.

It is an amenable number.

157821052 is a deficient number, since it is larger than the sum of its proper divisors (118365796).

157821052 is a wasteful number, since it uses less digits than its factorization.

157821052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39455267 (or 39455265 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 157821052 is about 12562.6849041119. The cubic root of 157821052 is about 540.4078446112.

The spelling of 157821052 in words is "one hundred fifty-seven million, eight hundred twenty-one thousand, fifty-two".