151611961 has 2 divisors, whose sum is σ = 151611962. Its totient is φ = 151611960.

The previous prime is 151611953. The next prime is 151612007. The reversal of 151611961 is 169116151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99121936 + 52490025 = 9956^2 + 7245^2 .

It is a cyclic number.

It is not a de Polignac number, because 151611961 - 2³ = 151611953 is a prime.

It is not a weakly prime, because it can be changed into another prime (151612961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75805980 + 75805981.

It is an arithmetic number, because the mean of its divisors is an integer number (75805981).

Almost surely, 2^151611961 is an apocalyptic number.

It is an amenable number.

151611961 is a deficient number, since it is larger than the sum of its proper divisors (1).

151611961 is an equidigital number, since it uses as much as digits as its factorization.

151611961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 31.

The square root of 151611961 is about 12313.0808898504. The cubic root of 151611961 is about 533.2258006728.

The spelling of 151611961 in words is "one hundred fifty-one million, six hundred eleven thousand, nine hundred sixty-one".