157447619 has 4 divisors (see below), whose sum is σ = 179940144. Its totient is φ = 134955096.

The previous prime is 157447613. The next prime is 157447637. The reversal of 157447619 is 916744751.

157447619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 916744751 = 13 ⋅70518827.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157447619 is a prime.

It is a super-2 number, since 2×157447619² = 49579505457538322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157447619.

It is not an unprimeable number, because it can be changed into a prime (157447613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11246252 + ... + 11246265.

It is an arithmetic number, because the mean of its divisors is an integer number (44985036).

Almost surely, 2^157447619 is an apocalyptic number.

157447619 is a deficient number, since it is larger than the sum of its proper divisors (22492525).

157447619 is an equidigital number, since it uses as much as digits as its factorization.

157447619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22492524.

The product of its digits is 211680, while the sum is 44.

The square root of 157447619 is about 12547.8133154745. The cubic root of 157447619 is about 539.9812739277.

The spelling of 157447619 in words is "one hundred fifty-seven million, four hundred forty-seven thousand, six hundred nineteen".