137531551 has 2 divisors, whose sum is σ = 137531552. Its totient is φ = 137531550.

The previous prime is 137531539. The next prime is 137531561. The reversal of 137531551 is 155135731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137531551 - 2¹¹ = 137529503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137531561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68765775 + 68765776.

It is an arithmetic number, because the mean of its divisors is an integer number (68765776).

Almost surely, 2^137531551 is an apocalyptic number.

137531551 is a deficient number, since it is larger than the sum of its proper divisors (1).

137531551 is an equidigital number, since it uses as much as digits as its factorization.

137531551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7875, while the sum is 31.

The square root of 137531551 is about 11727.3846615518. The cubic root of 137531551 is about 516.1795328544.

The spelling of 137531551 in words is "one hundred thirty-seven million, five hundred thirty-one thousand, five hundred fifty-one".