151294981 has 2 divisors, whose sum is σ = 151294982. Its totient is φ = 151294980.

The previous prime is 151294931. The next prime is 151294993. The reversal of 151294981 is 189492151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118048225 + 33246756 = 10865^2 + 5766^2 .

It is an emirp because it is prime and its reverse (189492151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151294981 - 2¹⁵ = 151262213 is a prime.

It is a super-2 number, since 2×151294981² = 45780342551580722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151294931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75647490 + 75647491.

It is an arithmetic number, because the mean of its divisors is an integer number (75647491).

Almost surely, 2^151294981 is an apocalyptic number.

It is an amenable number.

151294981 is a deficient number, since it is larger than the sum of its proper divisors (1).

151294981 is an equidigital number, since it uses as much as digits as its factorization.

151294981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 40.

The square root of 151294981 is about 12300.2024780082. The cubic root of 151294981 is about 532.8539306185.

The spelling of 151294981 in words is "one hundred fifty-one million, two hundred ninety-four thousand, nine hundred eighty-one".