157211447 has 8 divisors (see below), whose sum is σ = 162624000. Its totient is φ = 151820280.

The previous prime is 157211443. The next prime is 157211471. The reversal of 157211447 is 744112751.

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 157211447 - 2² = 157211443 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 (157211441) 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, 10388 + ... + 20550.

It is an arithmetic number, because the mean of its divisors is an integer number (20328000).

Almost surely, 2^157211447 is an apocalyptic number.

157211447 is a deficient number, since it is larger than the sum of its proper divisors (5412553).

157211447 is a wasteful number, since it uses less digits than its factorization.

157211447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10693.

The product of its digits is 7840, while the sum is 32.

The square root of 157211447 is about 12538.3989009762. The cubic root of 157211447 is about 539.7111475288.

The spelling of 157211447 in words is "one hundred fifty-seven million, two hundred eleven thousand, four hundred forty-seven".