155247490 has 16 divisors (see below), whose sum is σ = 279587448. Its totient is φ = 62067456.

The previous prime is 155247487. The next prime is 155247497. The reversal of 155247490 is 94742551.

It can be written as a sum of positive squares in 4 ways, for example, as 93954249 + 61293241 = 9693^2 + 7829^2 .

It is not an unprimeable number, because it can be changed into a prime (155247497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35884 + ... + 39976.

Almost surely, 2^155247490 is an apocalyptic number.

155247490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155247490 is a deficient number, since it is larger than the sum of its proper divisors (124339958).

155247490 is a wasteful number, since it uses less digits than its factorization.

155247490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7893.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 155247490 is about 12459.8350711396. The cubic root of 155247490 is about 537.4542841955.

The spelling of 155247490 in words is "one hundred fifty-five million, two hundred forty-seven thousand, four hundred ninety".