151715861 has 4 divisors (see below), whose sum is σ = 165508224. Its totient is φ = 137923500.

The previous prime is 151715833. The next prime is 151715869. The reversal of 151715861 is 168517151.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 151715861 - 2¹⁸ = 151453717 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 (151715869) 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, 6896165 + ... + 6896186.

It is an arithmetic number, because the mean of its divisors is an integer number (41377056).

Almost surely, 2^151715861 is an apocalyptic number.

151715861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

151715861 is a deficient number, since it is larger than the sum of its proper divisors (13792363).

151715861 is a wasteful number, since it uses less digits than its factorization.

151715861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13792362.

The product of its digits is 8400, while the sum is 35.

The square root of 151715861 is about 12317.2992575483. The cubic root of 151715861 is about 533.3475797844.

The spelling of 151715861 in words is "one hundred fifty-one million, seven hundred fifteen thousand, eight hundred sixty-one".