157994554 has 4 divisors (see below), whose sum is σ = 236991834. Its totient is φ = 78997276.

The previous prime is 157994533. The next prime is 157994563. The reversal of 157994554 is 455499751.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 149450625 + 8543929 = 12225^2 + 2923^2 .

It is a junction number, because it is equal to n+sod(n) for n = 157994498 and 157994507.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39498637 + ... + 39498640.

Almost surely, 2^157994554 is an apocalyptic number.

157994554 is a deficient number, since it is larger than the sum of its proper divisors (78997280).

157994554 is an equidigital number, since it uses as much as digits as its factorization.

157994554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78997279.

The product of its digits is 1134000, while the sum is 49.

The square root of 157994554 is about 12569.5884578613. The cubic root of 157994554 is about 540.6058061681.

The spelling of 157994554 in words is "one hundred fifty-seven million, nine hundred ninety-four thousand, five hundred fifty-four".