157974551 has 8 divisors (see below), whose sum is σ = 180727680. Its totient is φ = 135267768.

The previous prime is 157974541. The next prime is 157974581. The reversal of 157974551 is 155479751.

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 157974551 - 2¹⁴ = 157958167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157974541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3941 + ... + 18206.

It is an arithmetic number, because the mean of its divisors is an integer number (22590960).

Almost surely, 2^157974551 is an apocalyptic number.

157974551 is a deficient number, since it is larger than the sum of its proper divisors (22753129).

157974551 is a wasteful number, since it uses less digits than its factorization.

157974551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23173.

The product of its digits is 220500, while the sum is 44.

The square root of 157974551 is about 12568.7927423440. The cubic root of 157974551 is about 540.5829906257.

The spelling of 157974551 in words is "one hundred fifty-seven million, nine hundred seventy-four thousand, five hundred fifty-one".