151721650 has 24 divisors (see below), whose sum is σ = 297056880. Its totient is φ = 57494160.

The previous prime is 151721623. The next prime is 151721681. The reversal of 151721650 is 56127151.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78904 + ... + 80803.

It is an arithmetic number, because the mean of its divisors is an integer number (12377370).

Almost surely, 2^151721650 is an apocalyptic number.

151721650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

151721650 is a deficient number, since it is larger than the sum of its proper divisors (145335230).

151721650 is a wasteful number, since it uses less digits than its factorization.

151721650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159738 (or 159733 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 151721650 is about 12317.5342500031. The cubic root of 151721650 is about 533.3543633201.

It can be divided in two parts, 151 and 721650, that added together give a triangular number (721801 = T₁₂₀₁).

The spelling of 151721650 in words is "one hundred fifty-one million, seven hundred twenty-one thousand, six hundred fifty".