157220453 has 8 divisors (see below), whose sum is σ = 169571808. Its totient is φ = 144905904.

The previous prime is 157220449. The next prime is 157220461. The reversal of 157220453 is 354022751.

It is a happy number.

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

It is not a de Polignac number, because 157220453 - 2² = 157220449 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 (157220423) 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, 26 + ... + 17732.

It is an arithmetic number, because the mean of its divisors is an integer number (21196476).

Almost surely, 2^157220453 is an apocalyptic number.

157220453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

157220453 is a deficient number, since it is larger than the sum of its proper divisors (12351355).

157220453 is a wasteful number, since it uses less digits than its factorization.

157220453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18403.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 157220453 is about 12538.7580325964. The cubic root of 157220453 is about 539.7214532792.

The spelling of 157220453 in words is "one hundred fifty-seven million, two hundred twenty thousand, four hundred fifty-three".